AD 96-06-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TPE331-14A | Airworthiness Directives; AlliedSignal Inc. TPE331 Series Turboprop Engines |
| engine | Honeywell International Inc. | TPE331-14B | Airworthiness Directives; AlliedSignal Inc. TPE331 Series Turboprop Engines |
| engine | Honeywell International Inc. | TPE331-14F | Airworthiness Directives; AlliedSignal Inc. TPE331 Series Turboprop Engines |
| engine | Honeywell International Inc. | TPE331-15AW | Airworthiness Directives; AlliedSignal Inc. TPE331 Series Turboprop Engines |
Unsafe Condition
Fatigue failure of engine compressor components (main shouldered shafts and forward coupling shafts) due to accumulative cyclic effects without an established retirement life, leading to an inflight engine shutdown.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initiate life limited part log cards for main shouldered shafts and forward coupling shafts. Remove main shouldered shafts from service based on cycles in service (5,600 or less CIS prior to 6,000 CIS or within 400 CIS after AD effective date if over 5,600 CIS). Remove forward coupling shafts prior to 20,000 CIS at next major inspection or compressor disassembly after AD effective date. Actions must follow specified AlliedSignal service documents.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless accomplished previously.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AlliedSignal Inc. (formerly Garrett Engine Division) Models TPE331-14A, -14B, -14F, and -15AW turboprop engines installed on Piper Model PA-42-1000 and Grumman Model TS-2A (modified per STC SA4837NM).
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.